Abstract
The Indian shield represents a vast repository of the Precambrian geological record. The Precambrian sedimentary basins were developed on four major Archaean nuclei (Dharwar, Bastar, Singhbhum and Aravalli–Bundelkhand; Fig. 1.1) and are comparable to those of Australia, South Africa, Canada and Brazil in scale and importance for global studies of Precambrian crustal evolution. Some of the Indian basinal successions, as elsewhere, contain valuable economic resources. Notwithstanding their global relevance, many aspects of the Indian Precambrian basins and even entire basins are not well known to international readers. Although specialist papers, a book (Naqvi & Rogers 1987) and special publications (e.g. Mazumder & Saha 2012) have been written by several authors on specific aspects of the Precambrian geology of India, a comprehensive account of the time–space distribution of the Precambrian supracrustal successions is lacking; in particular, the interrelation between tectonics and sedimentation, and the similarities and dissimilarities of their evolutionary histories with other comparable successions in other parts of the world are yet to be addressed in any detail. The purpose of the present memoir is to fill in this knowledge gap. In addition, the memoir will assess the potential mineral resources of Indian Proterozoic basins and integrate piecemeal information to provide a comprehensive picture of Indian cratonic evolution during the Precambrian. Fig. 1.1. Sketch map showing four Archaean nuclei in India. Note Proterozoic sedimentary basins (dark grey patches) and the large Deccan basaltic province. SGT, Southern Granulite Terrain; NFB, Nallamalai fold belt; CITZ, Central Indian Tectonic Zone; PG, Pranhita Godavari Valley; Ab, Abujhmar Basin; Am, Ampani Basin; Bh, Bhima Basin; Ch, Chattisgarh Basin; Idv, Indravati Basin; Kal, Kaladgi Basin; Suk, Sukma Basin; Ban, Bangalore; Cd, Cuddapah; Hyd, Hyderabad; K, Kurnool; Kh, Khariar; Nel, Nellore; Ong, Ongole; Vij, Vijaywada (after Saha & Mazumder 2012). The content of the memoir has been divided …
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